Page 1 of 2 12 LastLast
Results 1 to 10 of 18

Thread: Math help. +rep

  1. #1
    Queen of Candy Land Ray-Chill's Avatar
    Join Date
    Dec 2011
    Gender
    Location
    Tacoma
    Posts
    619
    Thanks
    683
    Thanked 243 Times in 139 Posts


    Downloads
    100
    Uploads
    0
    Mentioned
    103 Post(s)
    Time Online
    5 d 3 h 33 m
    Avg. Time Online
    3 m
    Rep Power
    7

    Math help. +rep

    Ah!! Help!!

    I'm so freaking lost...

    I have (1+cos(y))/(1+sec(y))

    I need to simplify it in terms of cos/sin..

    I'm stuck.. I don't understand how to get the fraction off..
    Last edited by Ray-Chill; 04-16-2012 at 10:26 PM. Reason: New problem..

  2. #2
    bamag's Avatar
    Join Date
    Dec 2011
    Gender
    Location
    127.0.0.1
    Posts
    659
    Thanks
    41
    Thanked 144 Times in 108 Posts


    Downloads
    34
    Uploads
    0
    Mentioned
    50 Post(s)
    Time Online
    N/A
    Avg. Time Online
    N/A
    Rep Power
    7
    y=3*4^x
    y=12*5^x
    For 1st one, you see the 3 so you factor that out, and from there its pretty obvious.
    For 2nd, since when x is 0, y is 12, that means a = 12. Then from there you can figure out the rest pretty easily.
    Last edited by bamag; 03-12-2012 at 09:47 PM.

  3. #3
    Ana's Avatar
    Join Date
    Mar 2012
    Gender
    Location
    No where :P
    Posts
    1,136
    Thanks
    973
    Thanked 949 Times in 570 Posts


    Downloads
    5
    Uploads
    0
    Mentioned
    439 Post(s)
    Time Online
    55 d 7 h 17 m
    Avg. Time Online
    42 m
    Rep Power
    12
    An exponential function f(x)=a⋅bx passes through the points (0, 12) and (3, 1500). What are the values of a and b?

    start with using (0, 12)
    12=a*b^0
    12=a

    then plug in the second point
    (3, 1500)
    1500=12*b^3
    125=b^3
    5=b

    a= 12
    b=5

    ---------- Post added at 08:55 PM ---------- Previous post was at 08:47 PM ----------

    Do you want the work for number 1?

  4. The Following User Says Thank You to Ana For This Useful Post:

    Ray-Chill (03-12-2012)

  5. #4
    Queen of Candy Land Ray-Chill's Avatar
    Join Date
    Dec 2011
    Gender
    Location
    Tacoma
    Posts
    619
    Thanks
    683
    Thanked 243 Times in 139 Posts


    Downloads
    100
    Uploads
    0
    Mentioned
    103 Post(s)
    Time Online
    5 d 3 h 33 m
    Avg. Time Online
    3 m
    Rep Power
    7
    =] No thanks. Lol My homework is all online so she can't see it anyways. =]
    Might have somemore problems later.

  6. #5
    Queen of Candy Land Ray-Chill's Avatar
    Join Date
    Dec 2011
    Gender
    Location
    Tacoma
    Posts
    619
    Thanks
    683
    Thanked 243 Times in 139 Posts


    Downloads
    100
    Uploads
    0
    Mentioned
    103 Post(s)
    Time Online
    5 d 3 h 33 m
    Avg. Time Online
    3 m
    Rep Power
    7
    8^(8x-3)=5^(10x-6)
    Solve for x..
    Please =]

  7. #6
    bamag's Avatar
    Join Date
    Dec 2011
    Gender
    Location
    127.0.0.1
    Posts
    659
    Thanks
    41
    Thanked 144 Times in 108 Posts


    Downloads
    34
    Uploads
    0
    Mentioned
    50 Post(s)
    Time Online
    N/A
    Avg. Time Online
    N/A
    Rep Power
    7
    My bad :p
    Last edited by bamag; 03-14-2012 at 12:49 AM.

  8. #7
    Little Brother


    Zachafer's Avatar
    Join Date
    Dec 2011
    Gender
    Posts
    1,206
    Thanks
    723
    Thanked 1,392 Times in 651 Posts


    Downloads
    81
    Uploads
    17
    Mentioned
    497 Post(s)
    Time Online
    21 d 17 h 35 m
    Avg. Time Online
    16 m
    Rep Power
    15
    There are definitely real solutions...

    Exact answer is x=(9log(2)-6log(5))/(24log(2)-10log(5))

  9. The Following User Says Thank You to Zachafer For This Useful Post:

    Ray-Chill (03-14-2012)

  10. #8
    Slasher's Avatar
    Join Date
    Dec 2011
    Gender
    Posts
    1,945
    Thanks
    354
    Thanked 156 Times in 128 Posts


    Downloads
    72
    Uploads
    0
    Mentioned
    81 Post(s)
    Time Online
    1 d 17 h 23 m
    Avg. Time Online
    1 m
    Rep Power
    9
    8^8x-3 = 5^10x-6
    (8x-3) * log8 = (10x-6) * log5
    (8x-3) * 0.903 = (10x-6) log5
    7.242x - 2.709 = 6.99x - 4.194
    0.234x = -1.485
    x = -6.346

    @Ray-Chill, almost the same amswer as Zachafer

  11. The Following User Says Thank You to Slasher For This Useful Post:

    Ray-Chill (03-14-2012)

  12. #9
    Queen of Candy Land Ray-Chill's Avatar
    Join Date
    Dec 2011
    Gender
    Location
    Tacoma
    Posts
    619
    Thanks
    683
    Thanked 243 Times in 139 Posts


    Downloads
    100
    Uploads
    0
    Mentioned
    103 Post(s)
    Time Online
    5 d 3 h 33 m
    Avg. Time Online
    3 m
    Rep Power
    7
    I love you guys.. You have no idea!

    Saved my life.

  13. #10
    Slasher's Avatar
    Join Date
    Dec 2011
    Gender
    Posts
    1,945
    Thanks
    354
    Thanked 156 Times in 128 Posts


    Downloads
    72
    Uploads
    0
    Mentioned
    81 Post(s)
    Time Online
    1 d 17 h 23 m
    Avg. Time Online
    1 m
    Rep Power
    9
    Quote Originally Posted by Ray-Chill View Post
    I love you guys.. You have no idea!

    Saved my life.
    No problem. If you need any help in math (or other subjects) around the same level of difficulty you can pm me!

  14. The Following User Says Thank You to Slasher For This Useful Post:

    Ray-Chill (03-14-2012)

Page 1 of 2 12 LastLast

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •